How can I fix "expected '{' as first char" in my testfor command?
How do you use the testfor command to detect if a player has a certain score?!
I tried,
/testfor @a [score_A_min=10]
but it says, "expected '{' as first char".
Best Answer
Short answer, you have an extra space where none should be
/testfor @a[score_A_min=10]
Long answer, the syntax for testfor is
/testfor <player> [dataTag]
where <player> is required and [dataTag] is optional. More importantly dataTag is not the target selector argument (which you are trying to use), but a compound NBT tag, which is indeed contained in {}, e.g. {XpLevel:3}.
The target selector argument has to follow the target selector immediately without a space in between, like this
@<variable>[<argument>=<value>,<argument>=<value>,…].
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